From 99f8c4434246c3483436b1abac917cf3f23ddbc2 Mon Sep 17 00:00:00 2001
From: Tiger Wang <ziwei.tiger@outlook.com>
Date: Mon, 20 Jul 2020 09:56:27 +0100
Subject: 1.14 connection support

---
 src/ByteBuffer.cpp | 46 +++++++++++++++++++++++++++++++++++++++++++---
 1 file changed, 43 insertions(+), 3 deletions(-)

(limited to 'src/ByteBuffer.cpp')

diff --git a/src/ByteBuffer.cpp b/src/ByteBuffer.cpp
index 6109afdee..f3a6e3a7d 100644
--- a/src/ByteBuffer.cpp
+++ b/src/ByteBuffer.cpp
@@ -472,7 +472,7 @@ bool cByteBuffer::ReadLEInt(int & a_Value)
 
 
 
-bool cByteBuffer::ReadPosition64(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
+bool cByteBuffer::ReadXYZPosition64(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 {
 	CHECK_THREAD
 	Int64 Value;
@@ -488,7 +488,7 @@ bool cByteBuffer::ReadPosition64(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 
 	// If the highest bit in the number's range is set, convert the number into negative:
 	a_BlockX = ((BlockXRaw & 0x02000000) == 0) ? static_cast<int>(BlockXRaw) : -(0x04000000 - static_cast<int>(BlockXRaw));
-	a_BlockY = ((BlockYRaw & 0x0800) == 0)     ? static_cast<int>(BlockYRaw) : -(0x0800     - static_cast<int>(BlockYRaw));
+	a_BlockY = ((BlockYRaw & 0x0800) == 0)     ? static_cast<int>(BlockYRaw) : -(0x01000    - static_cast<int>(BlockYRaw));
 	a_BlockZ = ((BlockZRaw & 0x02000000) == 0) ? static_cast<int>(BlockZRaw) : -(0x04000000 - static_cast<int>(BlockZRaw));
 	return true;
 }
@@ -497,6 +497,31 @@ bool cByteBuffer::ReadPosition64(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
 
 
 
+bool cByteBuffer::ReadXZYPosition64(int & a_BlockX, int & a_BlockY, int & a_BlockZ)
+{
+	CHECK_THREAD
+	Int64 Value;
+	if (!ReadBEInt64(Value))
+	{
+		return false;
+	}
+
+	// Convert the 64 received bits into 3 coords:
+	UInt32 BlockXRaw = (Value >> 38) & 0x03ffffff;  // Top 26 bits
+	UInt32 BlockZRaw = (Value >> 12) & 0x03ffffff;  // Middle 26 bits
+	UInt32 BlockYRaw = (Value & 0x0fff);            // Bottom 12 bits
+
+	// If the highest bit in the number's range is set, convert the number into negative:
+	a_BlockX = ((BlockXRaw & 0x02000000) == 0) ? static_cast<int>(BlockXRaw) : (static_cast<int>(BlockXRaw) - 0x04000000);
+	a_BlockY = ((BlockYRaw & 0x0800)     == 0) ? static_cast<int>(BlockYRaw) : (static_cast<int>(BlockYRaw) - 0x01000);
+	a_BlockZ = ((BlockZRaw & 0x02000000) == 0) ? static_cast<int>(BlockZRaw) : (static_cast<int>(BlockZRaw) - 0x04000000);
+	return true;
+}
+
+
+
+
+
 bool cByteBuffer::ReadUUID(cUUID & a_Value)
 {
 	CHECK_THREAD
@@ -718,7 +743,7 @@ bool cByteBuffer::WriteVarUTF8String(const AString & a_Value)
 
 
 
-bool cByteBuffer::WritePosition64(Int32 a_BlockX, Int32 a_BlockY, Int32 a_BlockZ)
+bool cByteBuffer::WriteXYZPosition64(Int32 a_BlockX, Int32 a_BlockY, Int32 a_BlockZ)
 {
 	CHECK_THREAD
 	CheckValid();
@@ -733,6 +758,21 @@ bool cByteBuffer::WritePosition64(Int32 a_BlockX, Int32 a_BlockY, Int32 a_BlockZ
 
 
 
+bool cByteBuffer::WriteXZYPosition64(Int32 a_BlockX, Int32 a_BlockY, Int32 a_BlockZ)
+{
+	CHECK_THREAD
+	CheckValid();
+	return WriteBEInt64(
+		(static_cast<Int64>(a_BlockX & 0x3FFFFFF) << 38) |
+		(static_cast<Int64>(a_BlockZ & 0x3FFFFFF) << 26) |
+		(static_cast<Int64>(a_BlockY & 0xFFF))
+	);
+}
+
+
+
+
+
 bool cByteBuffer::ReadBuf(void * a_Buffer, size_t a_Count)
 {
 	CHECK_THREAD
-- 
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